A former borate mine located in the center N½ sec. 21, T26N, R2E, SBM, 10.1 km (6.3 miles) NW of Ryan, in Furnace Creek Wash at the mouth of Corkscrew Canyon, E flank of the Black Mountains, on National Park Service wilderness land (Death Valley National Park/Death Valley Wilderness). Owned by the U.S. Borax and Chemical Co. (1976). MRDS database stated accuracy for this location is 1,000 meters.

The entrance to this site is through a locked gate east on Route 190 about 1-1/4 miles beyond the exit road from Twenty-Mule-Team Canyon. Mine workings found here alongside a wash consisted of several adits, a huge wooden four-chute ore bin, and an adjacent platform loading area. Activity here was all underground.Greene, 1981

Mineralization is a Miocene borate deposit (Mineral occurrence model information: Model code: 260; USGS model code 35b.3; Deposit model name: lacustrine borates), hosted in rocks of the Furnace Creek Formation (mudstone, shale, sandstone, limestone). The ore body is 548.64 meters long and has a depth-to-top of 0.0 meters. The borate-bearing zone is about 1,800 feet long. The colemanite is massive and cavernous. Basalt occurs in the footwall; tuffaceous mudstone and sandstone occur in the hanging wall. Local rocks include Tertiary nonmarine rocks, undivided.

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